How Banks Make Money: A Plain-Words Overview

A checking account can cost nothing each month, and the lights in the branch still stay on. Someone pays for the staff, the buildings, the apps, and the machines. Learning how banks make money helps explain the fees, rates, and offers that show up in your own mailbox.

Banks are businesses, and like most businesses, they aim to bring in more than they spend. They often earn money in a few broad ways: lending, fees, and payments made with cards. Each way is fairly simple once it is put in plain words. Knowing how banks make money can turn a confusing fee schedule into something you can read with a calm mind.

This guide gives a general overview using small made-up numbers. It shares general information only, and it is not advice or instructions. It does not describe how any particular bank runs its business, since each one is different. The examples have the United States in mind. Take it one idea at a time, and feel free to stop after any section and look at your own account papers.

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A bank is a business that handles money

At its heart, a bank takes in deposits and makes loans. A deposit is money people place in an account. A loan is money the bank lets someone borrow and pay back over time, usually with interest.

Banks also handle payments. They move money between accounts, process card swipes, and keep records. Each of these services costs something to run, and banks often look for ways to earn money from them too.

Credit unions offer many of the same services. They are often set up as member-owned, not-for-profit groups, so the way they work can differ. Still, many of the same basic ideas apply to both.

Write down whether your account is with a bank or a credit union, and note what services you use there.

The lending spread in plain words

One common way banks earn money is called the spread. The spread is the gap between the interest a bank pays on deposits and the interest it charges on loans.

Here is an example with made-up numbers. Say a bank pays a made-up 1 percent a year on a $1,000 savings deposit. That is $10 a year to the saver. Now say the bank lends out that same $1,000 at a made-up 7 percent a year. That is $70 a year from the borrower. Subtract $10 from $70, and the spread is $60.

Real banking is far more complex. Banks have costs, some loans are never paid back, and there are many rules to follow. The made-up example only shows the basic idea. For related reading, see a page about compound interest.

Look at the rate you earn on savings and the rate on any loan you have, and notice the gap.

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Interest from loans and credit cards

Loans come in many forms. Home loans, car loans, personal loans, and business loans all may bring in interest over time.

Credit cards are a big part of the picture for many banks. When a card balance is not paid in full, interest is often charged on what is left. Card rates are often higher than many other loan rates, though rates vary a lot by card and person. You may also like this page about card debt.

If card debt feels heavy, feeling confused or stuck is normal. A nonprofit credit counselor or a trusted person can help you look at your options without judgment.

Find the interest rate on any card you have and write it in your budget notebook.

“Once you see how a bank earns its money, its fees and offers start to make sense.”

Account fees and what they may cover

Fees are another way banks may earn money. Common types can include monthly account fees, fees for using a machine outside the bank’s network, and fees for paper statements or certain transfers.

Another common type is an overdraft fee. An overdraft happens when a payment goes through even though the account does not have enough money to cover it. Some banks charge a fee for this, and the rules differ from bank to bank.

Fees vary a great deal, and many can be avoided under certain account terms. The bank’s fee schedule, which is a document that lists its fees, is the place to check. Another place to look is this page about checking account fees.

Find the fee schedule for your own account and circle any fee you have paid in the past.

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Card swipe fees, explained simply

When you pay with a card at a shop, the shop often pays a small fee on that sale. Part of that fee may go to the bank that gave you the card. This is sometimes called an interchange fee, which simply means a fee shared among the groups that move the payment.

Here is a made-up example. Say you buy a $100 item with a card, and the shop pays a made-up 2 percent fee. Two percent of $100 is $2. The shop receives $98, and that $2 is split among the groups involved. Real fees and how they are split vary a lot.

Some shops offer a lower price for cash, or set a small minimum for card use, and card fees may be one reason. Rules about this differ by place.

Notice whether any shop you visit lists a different price for cash or a card.

Other services that may bring in money

Banks often offer more than checking and savings. They may charge for wire transfers, which are fast transfers of money between banks. They may rent safe deposit boxes or charge for printed checks.

Some banks also offer services such as investment accounts or business services. These may bring in fees or other income. What a bank offers, and what it charges, depends on that bank.

None of this is good or bad on its own. It simply helps to know that a service might come with a price, so you can ask about it first.

List the bank services you used in the past three months and note any that came with a charge.

What free often means at a bank

Many banks advertise free accounts. Free usually means no monthly fee, but other fees may still apply. Some free accounts also come with conditions, such as a minimum balance or a regular deposit.

A bank can still earn money from a free account. Deposits can help support lending, and card swipes may bring in fees from shops. That is part of why free accounts exist at all.

Reading the full account terms can show what free covers and what it does not. If something is unclear, the bank’s customer service line can explain it.

Read the terms for your account and write down any conditions tied to keeping it free.

Your side of the deal

You give a bank a place to hold your money and, often, card activity. In return, you get a safe place for deposits, a way to pay bills, and sometimes a little interest.

In the United States, many bank and credit union deposits are insured by government-backed programs up to certain limits. The rules and limits can change, so the bank or credit union can explain how its own accounts are covered.

Knowing both sides can help you compare options. Some people compare fees, rates, convenience, and service. Others care most about having a branch nearby. Each choice has its own trade-offs.

Write three things that matter most to you in a bank or credit union.

Questions to ask your bank or credit union

A few plain questions can make any account easier to understand. What fees could I be charged, and how can I avoid them? What happens if a payment would overdraw my account? What rate does my savings earn, and can it change?

You can also ask whether there are alerts for low balances, and whether a different account type might fit your habits better. Asking is free, and these are common questions. For related reading, see a page about money knowledge.

Writing the answers down, with the name of the person who helped and the day you asked, can help later. If an answer still feels unclear, a nonprofit credit counselor can help explain it.

Copy these questions into a note and bring them to your next call or visit with your bank.

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